All of the participants were recruited, in a non-probabilistic way, from the Valencian Association of Affected of Fibromyalgia from date to april 2016. Inclusion criteria include: age between 18 and 70 years old and diagnosis of fibromyalgia based on the American College of Rheumatology (ACR) diagnostic criteria. Once they expressed their interest in taking part of the study, potential participants underwent an examination by a rheumatologist of the association to confirm the diagnosis of fibromyalgia. People with other different diagnosis, musculoskeletal or neurological disorders that prevented the follow-up study, infections, whiplash, migraine, skin hypersensitivity or heart devices were excluded.